docs: def add(env, securitygroup_id, remote_ip, remote_group,
          direction, ethertype, port_max, port_min, protocol):
      """Add a security group rule to a security group.
  
      \b
      Examples:
          # Add an SSH rule (TCP port 22) to a security group
          slcli sg rule-add 384727 \\
              --direction ingress \\
              --protocol tcp \\
              --port-min 22 \\
              --port-max 22
  
      \b
          # Add a ping rule (ICMP type 8 code 0) to a security group
          slcli sg rule-add 384727 \\
              --direction ingress \\
              --protocol icmp \\
              --port-min 8 \\
              --port-max 0
      """
      mgr = SoftLayer.NetworkManager(env.client)
  
      ret = mgr.add_securitygroup_rule(securitygroup_id, remote_ip, remote_group,
                                       direction, ethertype, port_max,
                                       port_min, protocol)
  
      if not ret:
          raise exceptions.CLIAbort("Failed to add security group rule")
  
      table = formatting.Table(REQUEST_RULES_COLUMNS)
      table.add_row([ret['requestId'], str(ret['rules'])])
  
      env.fout(table)